<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>参数列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片内容 -->
    <el-card>
      <!-- 警告区域 -->
      <el-alert
        title="注意：只允许为三级分类设置相关参数"
        type="warning"
        center
        show-icon
        :closable="false"
      >
      </el-alert>
      <!-- 选择商品分类区域 -->
      <el-row>
        <el-col>
          <span>选择商品分类：</span>
          <!-- 选择商品分类的级联选择框 -->
          <el-cascader
            v-model="selectedCateKeys"
            :options="catelist"
            :props="cateProps"
            @change="cateChange"
            expandTrigger="hover"
            clearable
          ></el-cascader>
        </el-col>
      </el-row>
      <!-- tabs页签区域 -->
      <el-tabs v-model="activeName" @tab-click="handleClick">
        <el-tab-pane label="动态参数" name="many">
          <el-button
            type="primary"
            size="mini"
            :disabled="isBtnDisabled"
            @click="addParamsDialogVisible = true"
            >添加参数</el-button
          >
          <!-- 动态参数的表格 -->
          <el-table :data="manyTableData" border scripe>
            <!-- 展开行 -->
            <el-table-column type="expand">
              <template slot-scope="scope">
                <el-tag
                  v-for="(item, i) in scope.row.attr_vals"
                  :key="i"
                  closable
                  @close="handelClose(i, scope.row)"
                  >{{ item }}</el-tag
                >
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                >
                </el-input>
                <el-button
                  v-else
                  class="button-new-tag"
                  size="small"
                  @click="showInput(scope.row)"
                  >+ New Tag</el-button
                >
              </template>
            </el-table-column>
            <!-- 索隐列 -->
            <el-table-column type="index"></el-table-column>
            <el-table-column
              label="参数名称"
              prop="attr_name"
            ></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button
                  type="primary"
                  icon="el-icon-edit"
                  size="mini"
                  @click="showEditDialog(scope.row.attr_id)"
                  >编辑</el-button
                >
                <el-button
                  type="danger"
                  icon="el-icon-delete"
                  size="mini"
                  @click="removeParams(scope.row.attr_id)"
                  >删除</el-button
                >
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
        <el-tab-pane label="静态属性" name="only">
          <el-button
            type="primary"
            size="mini"
            :disabled="isBtnDisabled"
            @click="addParamsDialogVisible = true"
            >添加参数</el-button
          >
          <!-- 静态属性表格 -->
          <el-table :data="onlyTableData" border scripe>
            <!-- 展开行 -->
            <el-table-column type="expand">
              <template slot-scope="scope">
                <el-tag
                  v-for="(item, i) in scope.row.attr_vals"
                  :key="i"
                  closable
                  @close="handelClose(i, scope.row)"
                  >{{ item }}</el-tag
                >
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                >
                </el-input>
                <el-button
                  v-else
                  class="button-new-tag"
                  size="small"
                  @click="showInput(scope.row)"
                  >+ New Tag</el-button
                >
              </template>
            </el-table-column>
            <!-- 索隐列 -->
            <el-table-column type="index"></el-table-column>
            <el-table-column
              label="属性名称"
              prop="attr_name"
            ></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button
                  type="primary"
                  icon="el-icon-edit"
                  size="mini"
                  @click="showEditDialog(scope.row.attr_id)"
                  >编辑</el-button
                >
                <el-button
                  type="danger"
                  icon="el-icon-delete"
                  size="mini"
                  @click="removeParams(scope.row.attr_id)"
                  >删除</el-button
                >
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
      </el-tabs>
    </el-card>
    <!-- 添加参数对话框 -->
    <el-dialog
      :title="'添加' + titleText"
      :visible.sync="addParamsDialogVisible"
      width="50%"
      @close="addParamsDialogClosed"
    >
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
      >
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="addForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addParamsDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addParams">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 修改参数对话框 -->
    <el-dialog
      :title="'修改' + titleText"
      :visible.sync="editParamsDialogVisible"
      width="50%"
      @close="editParamsDialogClosed"
    >
      <el-form
        :model="editForm"
        :rules="editFormRules"
        ref="editFormRef"
        label-width="100px"
      >
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="editForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editParamsDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editParams">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>
<script>
export default {
  data() {
    return {
      catelist: [],
      //   级联选择框选中的分类id数组
      selectedCateKeys: [],
      //   级联选择框的配置对象
      cateProps: {
        value: 'cat_id',
        label: 'cat_name',
        children: 'children',
        checkStrictly: true,
      },
      //   tabs页签绑定的动态值
      activeName: 'many',
      //   动态参数的数据
      manyTableData: [],
      //   静态属性的数据
      onlyTableData: [],
      // 控制添加参数对话框显示和隐藏
      addParamsDialogVisible: false,
      // 添加参数的数据
      addForm: {},
      // 添加参数的数据的验证规则
      addFormRules: {
        attr_name: [
          { required: true, message: '请输入活动名称', trigger: 'blur' },
        ],
      },
      // 控制修改对话框显示隐藏
      editParamsDialogVisible: false,
      // 修改对话框的数据
      editForm: {},
      // 修改对话框的验证规则
      editFormRules: {
        attr_name: [
          { required: true, message: '请输入活动名称', trigger: 'blur' },
        ],
      },
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    //   获取商品分类数据列表
    async getCateList() {
      const { data: res } = await this.$axios.get('categories')
      if (res.meta.status !== 200)
        return this.$message.error('获取商品分类列表失败')
      this.catelist = res.data
    },
    // 级联选择框选中项发生变化时触发
    cateChange() {
      console.log(this.selectedCateKeys)
      //   如果选中的数组长度不是3 则说明选中的不是三级分类
      if (this.selectedCateKeys.length !== 3) {
        this.selectedCateKeys = []
        this.manyTableData = []
        this.onlyTableData = []
        return
      }
      this.getParamsData()
    },
    // 切换tab页签触发
    handleClick() {
      console.log(this.activeName)
      this.getParamsData()
    },
    // 获取参数的列表数据
    async getParamsData() {
      //   根据所选分类id和当时所处，获取对应的参数
      const { data: res } = await this.$axios.get(
        `categories/${this.cateId}/attributes`,
        {
          params: { sel: this.activeName },
        }
      )
      if (res.meta.status !== 200)
        return this.$message.error('获取商品参数失败')
      res.data.forEach((item) => {
        item.attr_vals = item.attr_vals === '' ? [] : item.attr_vals.split(',')
        item.inputVisible = false
        item.inputValue = ''
      })
      console.log(res.data)
      if (this.activeName === 'many') {
        this.manyTableData = res.data
      } else {
        this.onlyTableData = res.data
      }
      // console.log(this.manyTableData)
    },
    // 添加参数对话框的关闭事件
    addParamsDialogClosed() {
      this.$refs.addFormRef.resetFields()
    },
    // 点击添加参数
    addParams() {
      this.$refs.addFormRef.validate(async (valid) => {
        if (!valid) return
        const { data: res } = await this.$axios.post(
          `categories/${this.cateId}/attributes`,
          {
            attr_name: this.addForm.attr_name,
            attr_sel: this.activeName,
          }
        )
        if (res.meta.status !== 201) return this.$message.error('添加参数失败')
        this.$message.success('添加参数成功')
        this.addParamsDialogVisible = false
        this.getParamsData()
      })
    },
    // 点击按钮展示修改对话框
    async showEditDialog(attr_id) {
      // 根据id查询将要修改的参数数据
      const {
        data: res,
      } = await this.$axios.get(
        `categories/${this.cateId}/attributes/${attr_id}`,
        { params: { sel: this.activeName } }
      )
      if (res.meta.status !== 200) return this.$message.error('获取参数失败')
      this.editForm = res.data
      console.log(this.editForm)
      this.editParamsDialogVisible = true
    },
    // 修改对话框的关闭事件
    editParamsDialogClosed() {
      this.$refs.editFormRef.resetFields()
    },
    // 确定修改的事件
    editParams() {
      this.$refs.editFormRef.validate(async (valid) => {
        if (!valid) return
        const {
          data: res,
        } = await this.$axios.put(
          `categories/${this.cateId}/attributes/${this.editForm.attr_id}`,
          { attr_name: this.editForm.attr_name, attr_sel: this.activeName }
        )
        if (res.meta.status !== 200) return this.$message.error('修改参数失败')
        this.$message.success('修改参数成功')
        this.getParamsData()
        this.editParamsDialogVisible = false
      })
    },
    // 点击删除按钮删除参数
    async removeParams(attr_id) {
      const removeResult = await this.$confirm(
        '此操作将永久删除该参数, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning',
        }
      ).catch((err) => err)
      if (removeResult !== 'confirm') return this.$message.info('已取消删除')
      const { data: res } = await this.$axios.delete(
        `categories/${this.cateId}/attributes/${attr_id}`
      )
      if (res.meta.status !== 200) return this.$message.error('删除参数失败')
      this.$message.success('删除参数成功')
      this.getParamsData()
    },
    // 按回车或者光标离开tag时触发
    async handleInputConfirm(row) {
      if (row.inputValue.trim().length === 0) {
        row.inputValue = ''
        row.inputVisible = false
        return
      }
      row.attr_vals.push(row.inputValue)
      row.inputValue = ''
      row.inputVisible = false
      console.log(row.attr_vals)
      this.saveAttrValues(row)
    },
    // 点击显示tag的输入框
    showInput(row) {
      row.inputVisible = true
      this.$nextTick((_) => {
        this.$refs.saveTagInput.$refs.input.focus()
      })
    },
    // 修改参数的函数
    async saveAttrValues(row) {
      const { data: res } = await this.$axios.put(
        `categories/${this.cateId}/attributes/${row.attr_id}`,
        {
          attr_name: row.attr_name,
          attr_sel: row.attr_sel,
          attr_vals: row.attr_vals.join(','),
        }
      )
      if (res.meta.status !== 200) return this.$message.error('修改参数项失败')
      this.$message.success('修改参数项成功')
    },
    // 监听tag标签的关闭事件删除对应参数
    handelClose(i, row) {
      row.attr_vals.splice(i, 1)
      this.saveAttrValues(row)
    },
  },
  computed: {
    isBtnDisabled() {
      if (this.selectedCateKeys.length !== 3) {
        return true
      } else {
        return false
      }
    },
    cateId() {
      if (this.selectedCateKeys.length === 3) {
        return this.selectedCateKeys[2]
      }
    },
    titleText() {
      if (this.activeName === 'many') {
        return '动态参数'
      } else {
        return '静态属性'
      }
    },
  },
}
</script>
<style scoped>
.el-row {
  margin: 15px 0;
}
.el-tag {
  margin: 7px;
}
.input-new-tag {
  width: 150px;
}
</style>